O-hydroxyazo dyestuffs



Patented June 14, 1938 UNITED STATES 2,,iZtA3Z PATENT O'FFlfiE Lendenfeld, Lcverkusen-Wiesdorf,

Germany,

assignors to General Aniline Works, lino, New York, N. Y., a corporation of Delaware N Drawing. Application May 2, 1936, Serial Claims.

The present invention relates to new watersoluble azodyestuiis, more particularly it relates to dyestuffs which may be represented by the following formula:

OH OH In the said formula R represents the radical of a diazotized aromatic amino bearing the hydroxy group in ortho-position to the azo group, for example the radical of a diazotized ortho-aminophenol compound, X stands for a hydrocarbon radical which may bear substituents, such as a1- kyl, hydroxyalkyl, alkoxyalkyl, cyclohexyl, aryl and aralkyl, or substituted aryl and aralkyl, such as tolyl, chlorophenyl, methoxyphenyl, chlorobenzyl and the like, and n stands for a whole number, and wherein the naphthalene nucleus may he further substituted in any manner, as for example by halogen, the carboxylic acid group or the sulfonic acid group.

Our new dyestufis are obtainable by combining in an alkaline medium, o-hydroxy-diazo compounds, as for example such of the benzene and naphthalene series, with derivatives of 2-amino- 7hydroxy-naphthalene, in which one hydrogen atom of the amino group is substituted by a hydrocarbon radical, as for instance, alkyl, hydroxyalkyl, cyclohexyl, aryl or aralkyl, and in which the naphthalene nucleus may be further substituted in any manner, as for example by halogen, the carhoxyl groupor the sulfonic acid group, selecting thereby the components in such a manner that at least one sulphonic acid group is present in the dyestufi molecule.

The dyestuffs obtained in this manner dye wool, when after-chromed, dark violet, blue to black shades of good fastness to fulling, steaming and light. some of the dyestufis can also be dyed according to the single-bath chroming process.

Further the dyestuiis can be converted by treat" ing with metal salts into complex metal compounds, the dyeings of which may be distinguished by an excellent dischargeability on wool and silk.

The following examples illustrate the invention:

Example 1.2l3.4 parts by weight of 4-nitro-2- amino-phenol-fi--sulphonic acid are diazotized with 6.9 parts by weight of sodium nitrite and hydrochloric acid. At 3-5 C. the diazo solution is added to an aqueous solution alkaline with sodiinn carbonate of 23.5 parts by weight of 2- plienyl-aminc-7hydroxynaphthalene.- The dye- In Germany May 23, 1935 stuff separated is isolated. In its free state it corresponds to the following formula:

1103? (EH OH It dyes wool, when after-chromed, and in accordance with the single-bath chroming procedure, a full bloomy black shade of very good fastness properties.

Example 2.-22.4 parts by Weight of l-chloro-Z- aminophenol-(i-sulfonic acid are diazotized with 6.9 parts by weight of sodium nitrite and hydrochloric acid and coupled, in an alkaline solution, according to Example 1, with 23.5 parts by weight of 2-phenylamino-7-hydroXy-naphthalene. The dyestufi" isolated, having in its free state the following formula:

is isolated and dyes wool, when after-chromed, blue shades.

Ezcample 4.19.9 parts by weight of 4,6-dinitro- Z-aminophenol are diazotized, in a medium alkaline with sodium carbonate, with 6.9 parts by weight of sodium nitrite and hydrochloric acid and, in a medium alkaline with sodium carbonate, combined with 31.5 parts by weight of 2-phenylamino 7 hydroxynaphthalene-G-sulfonic acid. The dyestuff having in its free state the following formula:

QMN.

dyes Wool, when after-chromed, black.

Example 5.-15.4 parts by weight of 5-nitr0- 2-aminophenol are diazotized and coupled, in a medium alkaline with sodium carbonate, with 28.3 parts by weight of 2-hydroxyethylamino-7- hydroxynaphthalene-6-sulfonic acid. The dyestuff having in its free state the following formula (3H SIOaH NHCHzCHzOH We claim:

1. Watersoluble azodyestufifs selected from the group consisting of compounds having in the free state the following formula:

OH OH HN X (803K) wherein R stands for the radical of a diazotized aromatic amine bearing the hydroxy group in ortho position to the azo group, X stands for a member selected from the group consisting of hydrocarbon radicals and hydroxy-, halogenand alkoxy-substituted hydrocarbon radicals, n stands for a whole number, and such derivatives thereof in which the naphthalene nucleus is substituted by substituents selected from the group consisting of halogen, the sulfonic acid and the carboxylic acid group, dyeing wool, when afterchromed dark violet to blue to black shades of good fastness to fulling, steaming and light.

2. Watersoluble azodyestuffs selected from the group consisting of compounds having in the free state the following formula:

wherein R stands for a radical of the benzene series bearing the hydroxy group in ortho-posi- Shades on wool when Diazotizing components Coupling components chromed 2-aminophenol-4,6-disulfonic acid a. 2-phenylamino-7-hydroxynaphthalene Violet gray. 4chloro-2-amin0phenol-5-sulfomc acld 2-phenylam1no-7-hydroxynaphthalene.. Blue.

6-nitro-2-aminophenol-4-sulfonic acid. fi-chloro-2-amin0phenol-4-snlfonic acid l-amino-Z-naphtholi-sulfonic acid G-nitro-1-amin0-2-napbth0l-4-sulfonic acid- 5-11itro-2-amin0phenol-4-sulfonic acid--- 4-nitro-2-aminophcnol-G-sulfonic-acid 4-chloro-2-aminophenol-fi-sulfonic acid 4-nitro-2-aminophenol-6-sulfonic acid 4-nitro-2-aminophenol6-sulfonic acid. 6-nitro-2-aminophenol-l-sulfonic acid- 4-cl1loro2-aminophenol-6-sulfonic acid.. 6-chloro-2-aminophcnol-4-sulfonic acid 4-nitr0-2-aminophcnol-(l-sulfonic acid 6-nitro-2-aminophenol-4-snlfonic acid 4-cl1loro-2-aminophenol-G-sulfonic acid fi-chloro-2-aminophenol-4-sulionic acid tchloro-2-aminophenol-6-sulfonic acid.. 4-nitro-2-aminophenoI-G-snlfonic acid. 2-aminophenol-4,fi-disulfonic acid fi-nitro-Z-aminophenol t-chloro-Q-aminophenol 3, 4, 6,-trichloro-2-aininopl1enol...

5-n.itro-2-aminophenol Z-phenylamino-7-hydroxynaphthalene.. Z-phenylammo-7-hydroxynaphthalene..

Z-phenylamino-7-hydroxynaphthalene..

Z-phenylamino-7-hydroxynaphthalene...

2-phenylamino-7-hydroxynaphthalene 2-hexahydroxyphenylamino-7-hydroxynaphthalene.

Z-hexahydroxyphenylamino-7-hydroxynaphthalene.

2-0chlorophenylamino-7-hydroxynaphtha1ene 2-o-methylphenylamino-7-hydroxynaphthalene.... 2-o1nethylphenyla1nino-7-hydroxynaphthalene.

2-o-methylphenyla1nino-7-hydroxynaphthalene..- 2-o-methylphenylamino-7-hydroxynaphthalene.- 2-m-methylphenyla1nino-7-hydroxynaphthalene- Z-m-methylphenylamino-7-hydroxynaphthalene- 2-n1-n1ethylphenylamino-7-hydroxynaphtbalene. 2-m-methylphenylamino-7-hydroxynaphth alene 2-p-methylphenylamino-7-hydroxynaphthalene.... Z-p-methylphenylamino-7-hydroxynaphthalene.... Z-p-methylphonylamino-7-hydroxynaphthalene-.

Z-p-methoxyphenylamino-7-hydroxynaphthalene.. B

2-p-metl1oxy phenylamino-7-hydroxynap11l-llalcne. 2-p-methoxyphenylamino-7-hydroxynaphthalene.. 2-p-methoxyphenylamino-7-hydroxynaphthalene. 2-p-sulfophenylamino-7-hydroxynapl1thalene 2-p-sulfo-phenylamino-7-hydroxynaphthalene 2-pcarboxyphenylamino-7-hydroxynaph thalene. 2-p-carboxyphenylamino-7-hydroxynaphthalcne. Z-p-carboxyphenylamino-7-hydr0xynaphthalene. Z-p-carboxyphenylamin0-7-l1ydroxynaphthalene. 2-m-carb oxyph enylamino-7-hydroxynaphthalcne Z-m-carboxyphenylaminO-T-hydroxynaphthalene 2-butylamino-7-hydroxynaphthalene 2 ethylanlino 7 hydroxy napththalene 6- sulfonic acid. 2 butylamino 7 hydroxy naphthalene 6- sulfonic acid. 2 phenylamino 7 hydroxy naphthalene 6 sulfonic acid. 2 phenylamino 7 hydroxy naphthalene 6- sulfonic acid. 2 0 methoxyphenylamino 7 hydroxynaphtha lene-fi-sulionic acid.

o. Reddish navy blue. Reddish blue. Reddish navy blue. Black.

Navy blue.

o. Rcddish navy blue. Reddish blue. Black violet R c d d is b brown. Reddish navy blue. Greenish gray.

lack. Navy blue. Reddish navy blue. Navy blue. Dark gray. Reddish navy blue. Black.

Reddish blue. Navy blue.

Bluish violet. Grayish black. Reddish navy blue. Reddish black. Blue.

Reddish blue.

Grayish violet.

Bluish black.

tion to the azo group, X stands for a member selected from the group consisting of hydrocarbon radicals and hydroxy-, halogenand alkoxy-substituted hydrocarbon radicals, n. stands for one of the numbers 1 and 2 and such derivatives thereof in which the naphthalene nucleus is substituted by substituents selected from the group consisting of halogen, the sulfonic acid and the carboxylic acid group, dyeing wool, when after-chromed dark violet to blue to black shades of good fastness to fulling, steaming and light.

3. Watersoluble azodyestufis having in the free state the following formula:

OH OH wherein R stands for the radical of a diazotized orthoaminophenol sulionic acid compound and X stands for a member selected from the group consisting of hydrocarbon radicals and hydroxy-, halogenand alkoxy-substituted hydrocarbon radicals.

4. The dyestufi having in its free state the following formula:

HOaS OH OH HOaS OH (JR dyeing wool when after-chromed a full black shade of good fastness properties.

PAUL ZERVAS.

PAUL v. LENDENFELD.

OCH: 

